Casto
Cast your characters in your own AI-written stories
What it does
Casto turns your imagination into a casting universe. Build characters with profile and backstory, cast them into a premise you sketch out, and an AI screenwriter weaves a 5-episode serialized story around them. After each chapter you choose what happens next. Every series joins your personal universe — characters carry over, and the world keeps growing. For storytellers, daydreamers, and anyone who's wanted to direct their own show.
Does the same job
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Dev tools · May 2026 · kilo.ai
- NW
Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
Life & fun · May 2026 · github.com
- FM
Dev tools · May 2026 · github.com